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(No Model.) 2 Sheets-Sheet 1.

H. A; BARNARD.

AIR BELT PURIPIBR.

N0. 485,571. 'Patented Nov.. 1, 1892.

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AIR BELT PUBIFIBR. No. 485,571.` y A Patented Nov. 1, 1892.

NITED STATES PATENT OEEICE.

HEMAN A. BARNARD, OF MOLINE, ILLINOIS, ASSIGN OR VTO THE BARNARD & LEASMANUFACTURING COMPANY, OF SAME PLACE.

AIR-BELT PURIFIEYR.l

SPECIFICATION formingpart of Letters Patent No.485,571, dated November f1, 1892. Application iiled March Z8, 1892. Serial No. 426,728. (Nomodel.)

To @ZZ whom it may concern.-

Be it known that I, HEMAN A. BARNARD, of Moline, in the county of RockIsland and State of Illinois, have invented certain new and usefulImprovements in Air-Belt Purifiers; and I do hereby declare that thefollowing is a full, clear, and exact description th ereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, which form part of this specification, in which- Figurel is a central vertical longitudinal section through my improvedair-belt purifier. Fig. 2 is a side elevation thereof. Fig. 3 is an endelevation.

This invention is a purifier for grain, middlings, 85o.; and its objectis to increase the number of puritications of the material which learnbe made at one passing through the machine and to separately deliver thedifferent .grades of material and waste from the machine; to make onefan produce a continuous air-current, which will, however, be split up,so that equally-clean air will be supplied to the air-separating trunks;to provide ample dust-settling chambers, and to make one device cleanboth dust-settling chambers.

The invention therefore consists in the novel combination andarrangement of separating-trunks, fan, conveyers, and scraperbelts, &c.,as will be hereinafter fully described and claimed.

In the drawings are shown but two separating devices, but more might beused, if desired, by lengthening the machine.

Referring to the drawings by letters, A designates the casing of themachine, closed on all sides, top, and bottom.

B is a feed-hopper in the front end and upper corner thereof, preferablyhaving a distributing-roller b in its mouth, which delivers the materialto be cleaned onto an inclined shunt-board c', by which said material isdirected into the lower end of a vertical airtrunk C, extendingtransversely of the machine beside the hopper and depending below thesame. Below said trunk is a receiving-trough H', in which is a conveyerH, by which material is carried out of the machine. The inner wall ofthe air-trunk-is connected to the inner side of the trough H; but aircan pass up between the end wall of the casing and over the trough intothe trunk and escape over the rear wall of the trunk at the l top of thecasing, as indicated by the arrows.

D is a hopper beside the upper end of trunk O and communicatingtherewith, having an inclined bottom d, arranged to catch material carried up through said trunk and falling onto said inclined bottom anddirect it into the lower end of a substantially-vertical airtrunk N,standing transversely of the machine and having a trough L at its lowerend,

in which is a conveyer L. Troughs H L lie near together and about in thesame plane and air can pass up between said troughs over trough L intotrunk N, as indicated by the arrows.

Gis a fan casing or chamber beside the trunk N, and G the fan therein,and .I is a hopper at the opposite side of the fan-cham- Y ber,communicating with trunks C and N over the top of the fan-chamber, asindicated.

I is a trough at the bottom of said hopper, provided with a conveyer I.The rear side of hopper .I is formed with an adjustable por and forth,so as to increase or lessen the width of said hopper. The air can'passover said hopper down beside and beneath trough I and then up into thefan-(casing, as indicated by the arrows. From the fan-chamber it escapesthrough a passage F into a chamber or passage F, extending beneath bothtroughs H L and thereby communicating with both trunks C N, asdescribed. The bottom F6 of chamber F is slightly above the bottom ofthe casing and parallel therewith and has an opening f at its endadjoining the end of the casing, through which material deposited on theiioor of chamber F can be swept out into the chamberE.ThespacebelowthehopperJ,fancasing G, and chamber F, I call afdustsettling chamber E. The bottom of the casing is inclined from front to rearand has a trough K at its rear end, provided with aconveyer K.

M is an endless belt or belts running over pulleys or rollers M M', journaled in the sides of the casing near the opposite ends and justabove the floor thereof. The upper part of said Ation or valve O, whichcan be turned back IOO belt runs through chamber F close to the floorthereof, entering said chamber through an opening f2 at the lower end ofpassage F', closed by a flap-valve f3, and passing from the chamberthrough opening f, as shown. These belts carry brushes m m., which asthe belt travels alternately sweep or scrape the iioors of chambers Fand E, carrying material from chamber F into chamber E and thence intotrough K'. The upper part of belt M thus sweeps chamber F and its lowerpart chamber E. I thus dispense with any independent brushing device forchamber F. Power is applied to the fan-shaft. From this shaft motion istransmitted to the shaft of conveyer H by a belt lH2 and pulleys of suchrelativo size that the speed of the fan is high and of the conveyerslow. Motion may be imparted to the feed-roller b, the pulleys M M, andthe conveyers L I K from the conveyer H by means of a singlesprocket-chain Z and sprockets, as indicated in Fig. 2.

Fais a valve in passage F for regulating the admission of air intochamber F, and F4 is a valve for regulating the admission of air fromchamber F to the separating-trunk N. In operating the device the fan isstarted and the air circulates continuously in the directions indicatedbythe arrows. The material is then fed from the hopper into trunk C andthe valve F4 is adjusted, so that the strongest current of air will bethrough trunk C. This current carries up all except the best andheaviest grade of material, which is deposited in trough H. The materialblown through trunk C falls in hopper D and is directedinto trunk N,where the second separation is made, the second grade of materialfalling into trough L', the other material being blown out of trunk Nover the fan-casing, where the third grade of material is caught inhopper J. The very light fluffy material and dust may be blow'n directlyover hoppers D and J into the chamber E,where it will be deposited andbe swept into trough K. Before the air again reaches theseparating-trunks it is compressed in passage F and then expanded intochamber F, and any impurities deposited on the iioor of said chamber areremoved by the traveling brushes eventually into trough K. It will beobserved that the air current through trunk C can expand immediatelyover hopper D and the currents from both trunks C and N can expand overhopper J. Thus the deposit of material in said hoppers is facilitatedand the current finds room for greatest expansion in chamber E, and thedeposit of dust, dto., therein is facilitated by the downward directionof the incoming current. A secondary air-current may be establishedthrough chambers F and E and fan-casing direct, as indicated by thetailles-s arrows in Fig. l, which will assist in causing deposit ofdust, &c., in chambers F and E. It is not actually necessary that theconveyers be provided with iiapvalves, as the amount of air entering orescaping through the openings thereof is not suficient to noticeablyaffect the operation of the machine.

Having described my invention, what I claim as new, and desire to secureby Letters Patent thereon, is-

l. The combination, in an endless air-belt purifier, of a pair ofair-trunks, a hopper between the same receiving from one and deliveringto the other, receptacles for the material falling through said trunks,an airchamber below and supplying air to said trunks, a fan-chambercommunicating with said air-chamber, and a settling-chambercommunicating with said fan and receiving air from air-trunks, and meansfor removing the matters deposited in the receptacles and dustchamber,substantially as described.

2. The combination, in an endless air-belt purifier, of a pair ofair-trunks, a hopper between the same receiving from one and de-vlivering to the other, receptacles for the ma terial falling throughsaid trunks, an airchamber below and communicating with said trunks, afan-chamber communicating with said air-chamber, and a settling-chambercommunicating with said fan and receiving air and dust from saidairtrunks, a hopper interposed between the second trunk anddust-chamber, valves for independently regulating the passage of airthrough said trunk, and means for removing the material deposited insaid receptacles, hopper, and dustchambers, substantially as set forth.

3. The combination of the fan-chamber, the air-chamber at one sidethereof, the separating device in said air-chamber, and thesetthug-chamber below said fan-ohamber and airchamber, with thetraveling brushes or scraper-s arranged to alternately sweep the floorof the air-chamber and dust-chamber, substantially as described.

4. The combination of the separating devices, the fan-chamber, thechamber F, andthe chamberE,extendingbeneath chamberF, with the pulleysand endless belts thereon, substantially as described, arranged so thatthe upper parts thereof extend through the chamber F and the lower partsof said belts are in chamber E, with the brushes or scrapers connectedto said belts and adapted to alternately sweep the fioor of chamber Fand chamber E, substantially as described.

5. The herein-described air^belt purilier, consisting of the casing, afeed-hopper therein, an air-trunk beside said hopper receiving materialtherefrom, a trough and conveyer below said trunk, a hoppercommunicating with the upper end of said trunk, a second air-trunkreceiving material from the latter hopper, a trough and conveyer belowsaid second trunk, a third hopper communicating with the upper end ofsaid second trunk, a fan-chamber and fan interposed between the secondtrunk and last hopper, an air-chamber below and supplying air to saidtrunks and IOO IIO

their troughs, communicating with said fan- In testimony that I claimthe foregoing as chamber, and a dust-chamber below the airmy own I affixmy signature in presence of two chamber, fan-chamber, and hoppers,commu- Witnesses.

nieating with said fau-chamber, the valves, HEMAN A. BARNARD. anddevices for removing material deposited Witnesses:

in said troughs and chambers, all substan- W. H. HILLHOUSE,

tially as and for the purpose set forth. C. V. GOULD. f

